Automation library · Lead generation

AI Lead Validator: Verify Emails with MCP and HubSpot

Started by another system calling it, and works across HubSpot and Slack. It hands the judgement calls to OpenAI. 12 steps, 2 branches: a working afternoon to understand properly.

MediumCalls a model: OpenAI

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12 stepsMedium: a working afternoon
2Branches: places the flow splits
0Loops or waits
2Services it connects to

The flow

Starts it 2Model 3Logic 3Service 4

The steps in the order they run, from what starts it.

  1. 1Form Submission WebhookWebhookStarts it
  2. 2GPT-4o-miniLm Chat Open AiModel
  3. 3Email Checker MCPMcp Client ToolModel
  4. 4Lead Quality AgentAgentModel
  5. 5Parse Lead DecisionCodeLogic
  6. 6Is Valid Lead?IfLogic
  7. 7Respond to FormRespond To WebhookStarts it
  8. 8HubSpot, Add Verified LeadHubspotService
  9. 9Is Risky Lead?IfLogic
  10. 10HubSpot, Add Risky LeadHubspotService
  11. 11Slack, Blocked Lead AlertSlackService
  12. 12Slack, Risky Lead AlertSlackService

How it's built

Starts on
Another system calling it
Steps
12, with 2 branches
Size
Medium: a working afternoon
Connects to
HubSpot, Slack
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own HubSpot and Slack accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 12 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 12 steps before you point it at anything that matters.